Mixing valve



y 4 v. B. NOVAK 2,349,051

MIXING VALVE Filed Oct. 27, 1941' 4] J7 3% Inventor Patented May 16, 1944 e coveted device e cesses WAMJE victor n. Novels, Norse, elude iinclicetion come: 2'), ltdl, serial No. iltflii 1 Claim. (or. sec-12) e mixing valve 01 such construction that flow oi hot and cold water through c mixing chamber of the valve may be controlled by a thermostat and the temperature of water delivered through the outlet of the mimns chamber maintained at a predetermined temperature.

Another object of the invention is to provide e. valve having chambers for hot and cold water at opposite sides of the mixing chamber, flow of water through these chambers into the mixinc chamber being controlled by a valve so constructed and mounted that as flow of cold water is gradually shut on, flow oi hot water will be correspondingly increased and adjustment oi the volve finally brought to a stop at a position in which water of the desired temperature will be delivered from the mixing chamber.

Another object of the invention is to provide e mixing valve wherein a spring controlling movement of the valve has one end connected with the valve and its other end anchored to a shaft which is rototsbly mounted for turning movement to piece the spring under predetermined tension and held in ediusted position by irictionel binding between the shaft and wells oi hearings in which the shaft is rotatably mounted.

Another object of the invention is to provide e valve which is simple in construction,

eticient in ooeretion end. not liable to get out order when in use. in the drawing:

l is a side elevation oi the improved mixvalve.

-on the place of use is to be connected. Threaded openings d are formed through walls oi the mixin chamber 2 at opposite ends of the body and into these openings are screwed the externally threaded inner ends of auxiliary casings 5 and 6 formed with inlet necks I and 8 at then tops and having their outer ends normally closed by caps 9 and iii which are in threaded engagement with the casings so that they may be removed when necessary. Sleeves H i and i2 extend longitudinally through the casings 5 and 6 axially thereof between webs i3 and N with their outer ends closedby the caps 9 and i0 and these sleeves have slots or ports 15 and 18 so that water entering the auxiliary casings may pass through the sleeves to lower portions of the casings and through. the openings l1 and it into the mixing chamber. It will thus be seen that when the valve is installed with the necks l and 8 connected with pipes leading from sources of cold and hot water and the neck 3 connected with a pipe leading to a place of use,

' hot and cold water may be led into the mixing chamber and mixed therein to provide a supply of water of a predetermined temperature for delivery to the place of use.

Flow oi water irom the aum'liary casings or chambers is controlled by a valve member iii consisting of a metal bar oi such length and diameter that it passes through the mime chamber and has its end portions snugly received in the sleeves. When the valve bar is in the position shown in 2, it blocks flow of hot water through sleeve i2 and unrestricted ilow of cold water is permitted through the sleeve ii.

' As the valve member or bar is shifted longitudiwith which a pipe for conducting water to a to I nally tovverd the leit of this figure, its right end portion gradually moves out of blocking relation to the ports it end, at the some time, its left end portion moves into blocking relation to the loris it. Therefore, new oi. cold water will be graduclly reduced and flow oi hot water gradually increased until how of cold water is entirely out on and hot water alone delivered to the mining chamber. Since the hot and cold water mixes in the chamber 2, water clothe desired temperature will be delivered through the pipe leading irom the outlet neck 3 to the place oi use, Stops ac, which project irom ends of the valve bar, limit movement of the her and prevent movement of the bar beyond a position in which flow of water through one sleeve will be entirely out oh and how or water at full volume allowed through the other sleeve. 4

The spring ti o! the thermostat by means of which movement of the valve bar is controlled, is formed of resilient metal which is expansible and contractible in response to temperature changes. This thermostat/spring is disposed under the valve bar and has its outer end engaged in a slot 22 formed in the valve bar whereit is secured by a pin 23 which passes transversely through the bar. The inner end of the spring is secured by a pin 24' to a shaft 24 which extends transversely through the mixing chamber and is rotatably mounted in bearings 25 and 26. One end portion protrudes from the bearing 26 and a cap or gland 21 is screwed upon this bearing to provide a tight seal and prevent leakage of water therethrough. The shaft has frictional binding engagement with the bearings and the cap 21 and, when it is turned, the spring will be wound or unwound, according to the direction I in which the shaft is turned, and tension of the spring so regulated that the valve bar will be held in a predetermined position for water of a certain temperature and moved by expansion or contraction of the spring to admit increased flow of hot or cold water when needed to restore the water in the mixingchamber to the desired temperature. An arcuate scale 28 having abutment pins 29 at its ends is formed on the casing I concentric to the shaft and the shaft carries a pointer 29' extending from the outer end of the shaft radially thereof with its free end crossing the scale. Appropriate temperature markings may be provided on the scale for accurate setting of the spring or the scale may be left blank and the proper point along the scale to stop movement of the pointer to obtain water of a desired temperature, learned by experience.

In Fig. there has been illustrated a mixing valve of a modfled construction. bodiment, the auxiliary casings 30 and 3| are formed integral with the main casing 32 and the bottom 33 of the main casing carrying the outlet neck 34 is threaded into place. Inlet necks 35 and 26 for hot and cold water extend upwardly from the auxiliary casings and outer ends of these casings are closed by caps 31 threaded on the casings. Partitions 38 divide the auxiliary casings into upper and lower chambers 39 and 40; and openings 4| are formed through the partitions so that water may flow through the communicating chambers and through the open- In this emings 4 into the mixing chamber.

The openings 4| have beveled walls to limit tilting movement of the'valve discs 42 and 43 which are pivotally mounted in the openings by pins 44 and 45. Ears 46 and 41 extend upwardly from the valve discs and are pivoted to outer ends of links 48 and 40 which have their inner ends pivoted to ends of a rod 60 which extends through the mixing chamber and midway its length is secured to the outer end of a thermostat spring 5| corresponding to the spring 2| and having its inner end fixed to. a shaft 52 corresponding to shaft 24.

' By turning the shaft as previously set forth, tension of the spring may be controlled and the valves opened and closed to regulate flow of hot and cold water through the valve and maintain the water ata predetermined temperature.

Having thus described the invention, what is claimed is:

In a mixing valve, a main casing defining a mixing chamber and having an outlet at its bottom, extensions at opposite ends of said main casing spaced upwardly from the bottom thereof. anddefining auxiliary chambers in opposed relation to each other, said auxiliary chambers having upper inlets and at their bottoms having outlets at their inner ends establishing communication with the mixing chamber in spaced relation to the bottom thereof, tubular sleeves extending horizontally through said auxiliary chambers above the outlets thereof and open at their ends, horizontal webs between opposite sides of said sleeves and side walls of the auxiliary chambers serving to support the sleeves and constituting partitions dividing the auxiliary chambers into upper inlet portions and lower outlet portions, said sleeves being formed with upper and lower alined openings for passage of liquid through the sleeves between upper and lower portions of the auxiliary chambers, caps detachablycarried by outer ends of said extensions and closing outer ends of the sleeves and upper and lower portions of the auxiliary chambers, a plunger extending horizontally through the mixing chamber with its end portions snugly reof said plunger.

VICTOR B. NOVAK. 

